With the gradual enrichment from the types of concrete, the types of superplasticizers have also improved, and naphthalene superplasticizers and polycarboxylic acid superplasticizers are beginning to be extensively used in concrete [27,28]. Though there are already a lot of types of superplasticizers, which might be all based on OPC, the https://graphene50370.aioblogs.com/90312012/fascination-about-micro-silica-fume